Remove unused GlobalHandles::IterateWeakRoots()

BUG=

Review URL: https://codereview.chromium.org/11969037
Patch from Kentaro Hara <haraken@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13445 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/global-handles.cc

@@ -494,16 +494,6 @@ void GlobalHandles::IterateWeakRoots(ObjectVisitor* v) {
 }
 
 
-void GlobalHandles::IterateWeakRoots(WeakReferenceGuest f,
-                                     WeakReferenceCallback callback) {
-  for (NodeIterator it(this); !it.done(); it.Advance()) {
-    if (it.node()->IsWeak() && it.node()->callback() == callback) {
-      f(it.node()->object(), it.node()->parameter());
-    }
-  }
-}
-
-
 void GlobalHandles::IdentifyWeakHandles(WeakSlotCallback f) {
   for (NodeIterator it(this); !it.done(); it.Advance()) {
     if (it.node()->IsWeak() && f(it.node()->location())) {

src/global-handles.h

@@ -108,8 +108,6 @@ class ImplicitRefGroup {
 };
 
 
-typedef void (*WeakReferenceGuest)(Object* object, void* parameter);
-
 class GlobalHandles {
  public:
   ~GlobalHandles();
@@ -178,10 +176,6 @@ class GlobalHandles {
   // Iterates over all weak roots in heap.
   void IterateWeakRoots(ObjectVisitor* v);
 
-  // Iterates over weak roots that are bound to a given callback.
-  void IterateWeakRoots(WeakReferenceGuest f,
-                        WeakReferenceCallback callback);
-
   // Find all weak handles satisfying the callback predicate, mark
   // them as pending.
   void IdentifyWeakHandles(WeakSlotCallback f);